[Bluetooth 5.0 & TF / Micro SD card] Advanced Bluetooth 5.0 technology provides faster and more stable signal transmission; supports TF/Micro SD card to provide you with the greatest convenience. TWS (True Wireless Stereo) technology provides independent left and right channels, allowing you to truly enjoy the surround sound of the theater.[12 hours of happy playing time] The portable wireless bluetooth speaker is powered by a durable 3000 mAh rechargeable lithium battery, which can play more than 12 hours on a single charge.[IPX7 100% waterproof] Portable Bluetooth speaker design, IPX7 waterproof, which means that it can fully work for 30 minutes at 1 m underwater, which can provide strong waterproof protection. Whether you are at home or outdoors, our Bluetooth speakers allow you to enjoy music in a variety of different environments.[Excellent sound quality] Dual 8W high-performance power drivers can provide shocking sound without distortion even at the maximum volume. The powerful subwoofer brings you an immersive listening experience, crystal clear treble, ultra deep Bass.